Comtech EF Data SLM-5650 Installation And Operation Manual page 79

SLM-5650 Satellite Modem
Front Panel Operation
IMPORTANT
Select: CONFIG: Transmit: DataRate
Tx Data Rate:
The user can enter the desired data rate in kilobits using step 1 or step 2 as follows:
1. Use the number keypad and enter the desired data rate (See Chapter 3).
2. Use the
Select: CONFIG: Transmit: Overhead
Tx:
Select the desired Overhead, Rate, RS-CW, and Depth and then press [E].
Overhead
Rate
RS-CW
Depth
IMPORTANT
When changing Modulation type the data rate must be set to a rate
supported by the modulation type or the change to the modulation type
will not be allowed. Some choices will only be visible if the modem is
set to a compatible mode or if an option is installed or enabled.
020000.000 kbps
Sym Rate: 0266666.666 ksps (
arrow keys to scroll up and down to select the desired data
rate. When scrolling data rate, the symbol rate will automatically be
recalculated and displayed.
When entering the data rate, the following interactions need to
be taken into account. If the modulation type selected is 8-PSK
or 16-QAM the minimum data rate allowed is 256 kbps. When
changing certain parameters like modem type, the data rate will
default to 64 kbps or 256 kbps. The calculated symbol rate is
IMPORTANT
displayed for the user. This is helpful for determining the
occupied bandwidth required for the selected modulation type,
code rate and overhead.
Overhead:None
RS-CW:N/A
(IESS-308, IESS-309 are standard), (AUPC is optional)
96 kbps (IESS-308), 1/15 (IESS-309 or AUPC), N/A (None)
126/112, 194/178, 208/192, 219/201, 220/200, 225/205,
(Reed Solomon Code Word, N/K)
4, 8 or 16 (Interleaving depth)
Some selections will only be visible if the modem is set to a compatible
mode or if an option is installed or enabled.
Rate: N/A
Depth:N/A (
4–9
Revision 2
MN/SLM5650.IOM
E)
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